Multiple-edge safety-razor.



PATENTBD MAR. 19, 1907. M. H. BAKER & F. S. PRISBIE.

MULTIPLE EDGE SAFETY RAZOR.

I APPLICATION FILED AUG. 17, 1906.

' WITNESSES A TTORNE Y.

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rmrnn s rrns ra'rnr MALCOLM r-r. BAKER AND. mutant s. team, or BOSTON, MASSAOHUI T0 all whom it may concern.-

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ASSIGNORS TO MULTIPLEX SAFETY RAZOR COMPANY, OF

BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MULTIPLE-EDGE SAFETY-RAZOR.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed August 17. 1906. Serial No. 330,935.

- Be it known that we, MALCOLM I'I. BAKER and FRANKLIN S. ,Fnrsnin, residents of the city of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements inMultiple- Edge Safety-Razors, of which the following is a specification.

It is the object of the present invention to roduce a razor of the safety type in which the blades by the use of a plurality of cutting edges shall have increased life-in other words, a' razor in which the blades require resharpening or replacing at longer intervals than in devices at present in use.

A further object is to employ every edge of the razor-blade as a cutting edge, and thus provide the maximum number of cutting edges, or, otherwise expressed, the equivalent of the maximum number of individual razors in a single blade.

A further object is to so shape the blade as to provide the maximum number of cutting edges of practically operative length in the minimum diameter of blade.

A further object is to provide arazor in which the cutting edge in use is in a parallel lane with the handle, and thus to provide or a drawing stroke in shaving, of the same t e as is employed in the ordinary old style f0 ding-blade razor.

A further object is to provide a blade of a form which is easlly removable from the guard and which adapts itself to honing or stroppingi A furt er object is to provide means for readily bringing any desired cutting edge of the blade into an operative position.

A further object is to provide a form of ard which not only protects the face from aceration by the cutting edge in use, but also protects both the face and the fingers from the remaining edges. A further object is to provide means for properly alining each cutting edge at the operative position.

. A further object is to rovide a razor which may be readily adapte for use with either the right or left. hand. A further object is to produce a razor of few and simple parts,

which may be easily cutting edge.

taken apart or assembled and which is readily cleansed after use.

, A further object is to produce a razor which occupies a minimum space when' packed for carrying and adapts itself to the pocket.

We provide a uard consisting of a plate'in approximately t e form of a hexagon and of a greater diameter than the blade. This guard is attached to a suitable handle by means of a threaded block whichengages a which readily screw set in one end of the said handle in such a manner that the handle and guard-lie in parallel planes. The above-mentioned threaded block is attachedto the guardplate at the back and near the junction of two of the edges. These two ed es are left plain; and the remaining four e gas of the guard-plate are cut into teeth.

We provide a blade in the form of a hexa gon every edge of which is sharpened to a cutting edge, having a central perforation and six equidistant perforations surrounding the center and adapted to act, as registering devices, as hereafter described. In order to attachthe blade to the guard-plate,we provide a screw which passes through the central perforation in the blade and through a corresponding opening in the ard-plate and engages a locking-nut at the said plate.

A small pin is set in the face of the guardlate and en ages successively withthe perorations int e blade as the latter is rotated in such a manner as to maintain alinement between the blade and guard edges.

In order to note which edges of the blade have been used and dulled, We consecutively number or otherwise denote each edge upon the face of the blade.

' We have illustrated our invention in the annexed drawings, in which-- Figure 1 is afront elevation, elevation, and Fig. 3 a side elevation, of our osition for shaving. Fig. 4 is a plan of the lilade, and Fig.5 a section of the locking-nut and engaging screw.

In the drawings, a is a hexagonal steel blade every edge of which is sharpened to a This blade is provided witha .ack of the Fig. 2 a back I improved. razor with the blade and parts in v roo - central opening openings i. he hexagonal guard-plate is provided with four toothed ed es (1 e f g and with two plain edges 1) .0, and a t eaded block W is attached to the guard-plate near the junction of the latter two ed es. A handle n, suitably'knurled to afford a proper grip to the fingers, carries a screw 0, which engages the-block m, and thus locks the handle in position in a guard-plate.

h A flat-head screw passes through the-central opening in the blade and through acorbefore described.

Ii -operation the blade edge marked 1, co operating' with the guard edged, is adapted for right hand use in the usual drawing lateral strokes in precisely the same manner as .I so

in the'old-style folding-blade razors. The

'inclinededges 5 and 6 are "available for up-- strokes about the chin, under and upper lips,

and such portions of th'e face without the necessity of turning over-the hand. The inclination and convergence of these edges gives a drawing out as the blade is pushed up over the face and greatly assists close and delicate shaving of parts of the face diflicult to reach with previous forms of razors. The

blade edgemarked 4 is available for use with the left hand. The edges '23 are held in reserve and are protected by the guard edges 1) c from lacerating the face or fingers. These edges may be brought into-operative positions by loosening the locking-nut and freeing the blade from engagement with the 'set pin j, when the said blade may be rotatedas desired. It is thus evident that the user has at his disposal six independent razor edges with each blade-and may employ from one to four of these edges in the above-described manner without altering the relation of thepa'rts of therazor.

In practice we provideeach-r'azor with twelve blades, thus affording the user seventyrtwo separate edges, thelength of time el'apsing before these edges are dulled, from one to two years, practically eliminating the usual necessity ofstropping andhoning.

, NV e have found that the hexagonal form of the handle i blade is the only one which effectively'accomplishes these results with a structure of v'practical size and having a sufficiently long cutting edge; v

. Ifit is desigr ed to employ a stroke in which placedat right angles to the blade and which is technically termed the hoe type, the said handle is unscrewed b and with six-registering plane parallel to the plane of the from the threaded block m and screwed into the recess p in the back of the locking-nut l. We claim as our invention-- 1' A safety-razor comprising a hexagonal blade every edge ofwhich is sharpened to a cutting edge, a guard for the said blade provided with four toothed and two plain edges, a handle attached to and approximately par-- successively engaging corresponding openings in the blade, a clamping-screw passing through the center of the blade and guard and engagin a locking-nut at the back of the guard, together with means for rotating the blade relatively to the guard. 3. In a safety-razor, a hexagonal every edge of which is sharpened to a cutting edge, a guard for the said blade having four toothed and two plain edges, a handle removably attached to and approximately parallel with the said guard, and means for rotatingf the blade relatively to the guard so as to bring the cutting edges into successive cooperation with the toothed edges of the guard, the said blade edges beingsuccessively.

marked for reference.

4. In a safety-razor, a hexagonal blade every edge of which is sharpened to a cutting edge, symbols marked upon the said blade in such. a manner as to successively denote the cutting edges, a guardfor the said blade having four toothed and two plain edges, a clamping-screw passing through the blade and guard and engaging a locking-nut at the back of the guard, a registering pin set in the face of the guard and engaging corresponding openings in the blade, a threaded block attached to the back of the guard near the.

junction of the'two plain guard edges, and a handle adapte to engage either the threaded block or th lo'ckingnut, substantially as described.

5. The safety-razor herein described, comprising a. hexagonal guard every edge of blade which issharpened' to a cutting edge, 00- I operating with a guard having four toothed and two plain edges,'-a registering pin 1' setin the face of the guard and engaging successively corresponding openings 4;, 'i, in the blade, a screw kpassing centrally through the blade and guard and'engagi'ng a lockingnut l, a threaded block mattached ,to the back of the guard near the junction of the two plain edges 1), c, and a handle 'n, provided ..with a threaded end 0, the said threaded endbeing-adapted to engage either the block m or the. locking-nut Z, as herein set forth.

6". In a safety-razor, a hexagonal steel 847,308 i J i blade every edge of which is sharpened to a upon the blade and successively denoting the iullttling edge, a central opening in the said cutting edges. I

)a e' a ocking-stud passing through the I central opening and clamping the blade to 3 the guard, equidistant registering openings I I surrounding the central opening and adapted Witnesses: V to successively engage a registering pin set in ELMER C. BIOKFORD, the face of the guard, and symbols marked GLADYs L. RAZA. 

